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							271 lines
						
					
					
						
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							271 lines
						
					
					
						
							8.4 KiB
						
					
					
				
								package engine
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								import (
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									"testing"
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									"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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								)
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								func TestStringFunctions(t *testing.T) {
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									engine := NewTestSQLEngine()
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									t.Run("LENGTH function tests", func(t *testing.T) {
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										tests := []struct {
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											name     string
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											value    *schema_pb.Value
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											expected int64
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											expectErr bool
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										}{
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											{
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												name: "Length of string",
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												value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
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												expected: 11,
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												expectErr: false,
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											},
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											{
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												name: "Length of empty string",
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												value: &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: ""}},
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												expected: 0,
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												expectErr: false,
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											},
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											{
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												name: "Length of number",
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												value: &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 12345}},
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												expected: 5,
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												expectErr: false,
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											},
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											{
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												name: "Length of null value",
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												value: nil,
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												expected: 0,
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												expectErr: true,
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											},
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										}
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										for _, tt := range tests {
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											t.Run(tt.name, func(t *testing.T) {
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												result, err := engine.Length(tt.value)
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												if tt.expectErr {
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													if err == nil {
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														t.Errorf("Expected error but got none")
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													}
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													return
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												}
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												if err != nil {
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													t.Errorf("Unexpected error: %v", err)
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													return
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												}
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												intVal, ok := result.Kind.(*schema_pb.Value_Int64Value)
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												if !ok {
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													t.Errorf("LENGTH should return int64 value, got %T", result.Kind)
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													return
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												}
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												if intVal.Int64Value != tt.expected {
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													t.Errorf("Expected %d, got %d", tt.expected, intVal.Int64Value)
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												}
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											})
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										}
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									})
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									t.Run("UPPER/LOWER function tests", func(t *testing.T) {
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										// Test UPPER
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										result, err := engine.Upper(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}})
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										if err != nil {
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											t.Errorf("UPPER failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "HELLO WORLD" {
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											t.Errorf("Expected 'HELLO WORLD', got '%s'", stringVal.StringValue)
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										}
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										// Test LOWER
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										result, err = engine.Lower(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}})
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										if err != nil {
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											t.Errorf("LOWER failed: %v", err)
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										}
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										stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "hello world" {
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											t.Errorf("Expected 'hello world', got '%s'", stringVal.StringValue)
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										}
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									})
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									t.Run("TRIM function tests", func(t *testing.T) {
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										tests := []struct {
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											name     string
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											function func(*schema_pb.Value) (*schema_pb.Value, error)
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											input    string
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											expected string
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										}{
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											{"TRIM whitespace", engine.Trim, "  Hello World  ", "Hello World"},
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											{"LTRIM whitespace", engine.LTrim, "  Hello World  ", "Hello World  "},
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											{"RTRIM whitespace", engine.RTrim, "  Hello World  ", "  Hello World"},
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											{"TRIM with tabs and newlines", engine.Trim, "\t\nHello\t\n", "Hello"},
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										}
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										for _, tt := range tests {
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											t.Run(tt.name, func(t *testing.T) {
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												result, err := tt.function(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: tt.input}})
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												if err != nil {
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													t.Errorf("Function failed: %v", err)
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													return
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												}
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												stringVal, ok := result.Kind.(*schema_pb.Value_StringValue)
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												if !ok {
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													t.Errorf("Function should return string value, got %T", result.Kind)
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													return
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												}
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												if stringVal.StringValue != tt.expected {
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													t.Errorf("Expected '%s', got '%s'", tt.expected, stringVal.StringValue)
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												}
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											})
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										}
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									})
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									t.Run("SUBSTRING function tests", func(t *testing.T) {
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										testStr := &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}}
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										// Test substring with start and length
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										result, err := engine.Substring(testStr, 
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											&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}},
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											&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
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										if err != nil {
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											t.Errorf("SUBSTRING failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "World" {
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											t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
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										}
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										// Test substring with just start position
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										result, err = engine.Substring(testStr, 
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											&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 7}})
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										if err != nil {
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											t.Errorf("SUBSTRING failed: %v", err)
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										}
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										stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "World" {
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											t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
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										}
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									})
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									t.Run("CONCAT function tests", func(t *testing.T) {
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										result, err := engine.Concat(
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello"}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: " "}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
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										)
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										if err != nil {
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											t.Errorf("CONCAT failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "Hello World" {
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											t.Errorf("Expected 'Hello World', got '%s'", stringVal.StringValue)
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										}
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										// Test with mixed types
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										result, err = engine.Concat(
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Number: "}},
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											&schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 42}},
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										)
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										if err != nil {
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											t.Errorf("CONCAT failed: %v", err)
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										}
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										stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "Number: 42" {
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											t.Errorf("Expected 'Number: 42', got '%s'", stringVal.StringValue)
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										}
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									})
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									t.Run("REPLACE function tests", func(t *testing.T) {
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										result, err := engine.Replace(
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World World"}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Universe"}},
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										)
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										if err != nil {
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											t.Errorf("REPLACE failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "Hello Universe Universe" {
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											t.Errorf("Expected 'Hello Universe Universe', got '%s'", stringVal.StringValue)
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										}
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									})
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									t.Run("POSITION function tests", func(t *testing.T) {
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										result, err := engine.Position(
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "World"}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
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										)
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										if err != nil {
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											t.Errorf("POSITION failed: %v", err)
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										}
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										intVal, _ := result.Kind.(*schema_pb.Value_Int64Value)
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										if intVal.Int64Value != 7 {
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											t.Errorf("Expected 7, got %d", intVal.Int64Value)
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										}
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										// Test not found
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										result, err = engine.Position(
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "NotFound"}},
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											&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}},
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										)
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										if err != nil {
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											t.Errorf("POSITION failed: %v", err)
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										}
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										intVal, _ = result.Kind.(*schema_pb.Value_Int64Value)
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										if intVal.Int64Value != 0 {
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											t.Errorf("Expected 0 for not found, got %d", intVal.Int64Value)
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										}
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									})
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									t.Run("LEFT/RIGHT function tests", func(t *testing.T) {
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										testStr := &schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello World"}}
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										// Test LEFT
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										result, err := engine.Left(testStr, &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
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										if err != nil {
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											t.Errorf("LEFT failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "Hello" {
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											t.Errorf("Expected 'Hello', got '%s'", stringVal.StringValue)
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										}
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										// Test RIGHT
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										result, err = engine.Right(testStr, &schema_pb.Value{Kind: &schema_pb.Value_Int64Value{Int64Value: 5}})
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										if err != nil {
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											t.Errorf("RIGHT failed: %v", err)
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										}
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										stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "World" {
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											t.Errorf("Expected 'World', got '%s'", stringVal.StringValue)
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										}
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									})
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									t.Run("REVERSE function tests", func(t *testing.T) {
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										result, err := engine.Reverse(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "Hello"}})
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										if err != nil {
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											t.Errorf("REVERSE failed: %v", err)
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										}
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										stringVal, _ := result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "olleH" {
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											t.Errorf("Expected 'olleH', got '%s'", stringVal.StringValue)
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										}
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										// Test with Unicode
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										result, err = engine.Reverse(&schema_pb.Value{Kind: &schema_pb.Value_StringValue{StringValue: "🙂👍"}})
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										if err != nil {
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											t.Errorf("REVERSE failed: %v", err)
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										}
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										stringVal, _ = result.Kind.(*schema_pb.Value_StringValue)
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										if stringVal.StringValue != "👍🙂" {
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											t.Errorf("Expected '👍🙂', got '%s'", stringVal.StringValue)
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										}
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									})
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								}
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