Add more test cases

.gitignore

@@ -1,2 +1 @@
 *.exe
-*.xml

main_test.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"os"
 	"regexp"
 	"strings"
 	"testing"
@@ -301,3 +302,218 @@ func TestLuaMathFunctions(t *testing.T) {
 		t.Fatalf("Expected modified content to be %q, but got %q", normalizedExpected, normalizedModified)
 	}
 }
+
+// Test with actual files
+func TestProcessingSampleFiles(t *testing.T) {
+	// Read test files
+	complexFile, err := os.ReadFile("test_complex.xml")
+	if err != nil {
+		t.Fatalf("Error reading test_complex.xml: %v", err)
+	}
+
+	testDataFile, err := os.ReadFile("test_data.xml")
+	if err != nil {
+		t.Fatalf("Error reading test_data.xml: %v", err)
+	}
+
+	testCases := []struct {
+		name         string
+		fileContent  string
+		regexPattern string
+		luaExpr      string
+		expectedFunc func(string) string // Function to generate expected output
+	}{
+		{
+			name:         "Complex file - multiply values by multiplier and divide by divider",
+			fileContent:  string(complexFile),
+			regexPattern: `(?s)<value>(\d+)</value>.*?<multiplier>(\d+)</multiplier>.*?<divider>(\d+)</divider>`,
+			luaExpr:      `v[1] * v[2] / v[3]`,
+			expectedFunc: func(content string) string {
+				// Replace values manually for verification
+				r := regexp.MustCompile(`(?s)<item>\s*<value>150</value>\s*<multiplier>2</multiplier>\s*<divider>4</divider>\s*</item>`)
+				content = r.ReplaceAllString(content, "<item>\n    <value>75</value>\n    <multiplier>2</multiplier>\n    <divider>4</divider>\n  </item>")
+
+				r = regexp.MustCompile(`(?s)<item>\s*<value>300</value>\s*<multiplier>3</multiplier>\s*<divider>2</divider>\s*</item>`)
+				content = r.ReplaceAllString(content, "<item>\n    <value>450</value>\n    <multiplier>3</multiplier>\n    <divider>2</divider>\n  </item>")
+
+				return content
+			},
+		},
+		{
+			name:         "Test data - simple multiplication",
+			fileContent:  string(testDataFile),
+			regexPattern: `(?s)<test id="simple">.*?<value>(\d+)</value>.*?</test>`,
+			luaExpr:      `*1.5`,
+			expectedFunc: func(content string) string {
+				r := regexp.MustCompile(`<value>100</value>`)
+				return r.ReplaceAllString(content, "<value>150</value>")
+			},
+		},
+		{
+			name:         "Test data - multiple capture groups",
+			fileContent:  string(testDataFile),
+			regexPattern: `(?s)<test id="multi">.*?<value>(\d+)</value>.*?<multiplier>(\d+)</multiplier>.*?<divider>(\d+)</divider>.*?</test>`,
+			luaExpr:      `v1 * v2 / v3`,
+			expectedFunc: func(content string) string {
+				r := regexp.MustCompile(`<value>50</value>`)
+				return r.ReplaceAllString(content, "<value>75</value>")
+			},
+		},
+		{
+			name:         "Test data - decimal values",
+			fileContent:  string(testDataFile),
+			regexPattern: `(?s)<test id="decimal">.*?<value>([0-9.]+)</value>.*?<multiplier>([0-9.]+)</multiplier>.*?</test>`,
+			luaExpr:      `v1 * v2`,
+			expectedFunc: func(content string) string {
+				r := regexp.MustCompile(`<value>10.5</value>`)
+				return r.ReplaceAllString(content, "<value>26.25</value>")
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			regex := regexp.MustCompile(tc.regexPattern)
+			luaScript := buildLuaScript(tc.luaExpr)
+
+			// Debug information
+			t.Logf("Regex pattern: %s", tc.regexPattern)
+			t.Logf("Lua expression: %s", tc.luaExpr)
+
+			// Process the content
+			modifiedContent, err := process(tc.fileContent, regex, luaScript)
+			if err != nil {
+				t.Fatalf("Error processing file: %v", err)
+			}
+			t.Logf("Modified content has length: %d", len(modifiedContent))
+
+			// Generate expected content
+			expectedContent := tc.expectedFunc(tc.fileContent)
+			t.Logf("Expected content has length: %d", len(expectedContent))
+
+			// Compare normalized content
+			normalizedModified := normalizeWhitespace(modifiedContent)
+			normalizedExpected := normalizeWhitespace(expectedContent)
+
+			// Check if the specific section was modified as expected
+			if !strings.Contains(normalizedModified, normalizeWhitespace(expectedContent)) {
+				t.Logf("Modified content: %s", normalizedModified)
+				t.Logf("Expected content: %s", normalizedExpected)
+				t.Fatalf("Expected modification not found in result")
+			} else {
+				t.Logf("Test passed - expected modification found in result")
+			}
+		})
+	}
+}
+
+func TestFileOperations(t *testing.T) {
+	// Test file operations with sample XML files
+
+	// Test 1: Complex file with multiple items
+	t.Run("Complex file operations", func(t *testing.T) {
+		// Read test file
+		complexFile, err := os.ReadFile("test_complex.xml")
+		if err != nil {
+			t.Fatalf("Error reading test_complex.xml: %v", err)
+		}
+		fileContent := string(complexFile)
+
+		// Configure test
+		regexPattern := `(?s)<value>(\d+)</value>.*?<multiplier>(\d+)</multiplier>.*?<divider>(\d+)</divider>`
+		luaExpr := `v[1] * v[2] / v[3]`
+
+		// Execute test
+		regex := regexp.MustCompile(regexPattern)
+		luaScript := buildLuaScript(luaExpr)
+
+		t.Logf("Regex pattern: %s", regexPattern)
+		t.Logf("Lua expression: %s", luaExpr)
+
+		// Process the content
+		modifiedContent, err := process(fileContent, regex, luaScript)
+		if err != nil {
+			t.Fatalf("Error processing file: %v", err)
+		}
+
+		// Verify results - should have 75 and 450 as values
+		t.Logf("Modified content: %s", modifiedContent)
+		if !strings.Contains(modifiedContent, "<value>75</value>") {
+			t.Errorf("First value not modified correctly, expected <value>75</value>")
+		}
+		if !strings.Contains(modifiedContent, "<value>450</value>") {
+			t.Errorf("Second value not modified correctly, expected <value>450</value>")
+		}
+		t.Logf("Complex file test completed successfully")
+	})
+
+	// Test 2: Test data file with simple multiplication
+	t.Run("Simple multiplication in test data", func(t *testing.T) {
+		// Read test file
+		testDataFile, err := os.ReadFile("test_data.xml")
+		if err != nil {
+			t.Fatalf("Error reading test_data.xml: %v", err)
+		}
+		fileContent := string(testDataFile)
+
+		// Configure test for simple value
+		regexPattern := `(?s)<test id="simple">.*?<value>(\d+)</value>.*?</test>`
+		luaExpr := `*1.5`
+
+		// Execute test
+		regex := regexp.MustCompile(regexPattern)
+		luaScript := buildLuaScript(luaExpr)
+
+		t.Logf("Regex pattern: %s", regexPattern)
+		t.Logf("Lua expression: %s", luaExpr)
+
+		// Process the content
+		modifiedContent, err := process(fileContent, regex, luaScript)
+		if err != nil {
+			t.Fatalf("Error processing file: %v", err)
+		}
+
+		// Check for expected value (100 * 1.5 = 150)
+		if !strings.Contains(modifiedContent, "<value>150</value>") {
+			t.Errorf("Value not modified correctly, expected <value>150</value> in the simple test")
+			t.Logf("Modified content: %s", modifiedContent)
+		} else {
+			t.Logf("Simple test passed - found <value>150</value>")
+		}
+	})
+
+	// Test 3: Decimal values
+	t.Run("Decimal values in test data", func(t *testing.T) {
+		// Read test file
+		testDataFile, err := os.ReadFile("test_data.xml")
+		if err != nil {
+			t.Fatalf("Error reading test_data.xml: %v", err)
+		}
+		fileContent := string(testDataFile)
+
+		// Configure test for decimal values
+		regexPattern := `(?s)<test id="decimal">.*?<value>([0-9.]+)</value>.*?<multiplier>([0-9.]+)</multiplier>.*?</test>`
+		luaExpr := `v1 * v2`
+
+		// Execute test
+		regex := regexp.MustCompile(regexPattern)
+		luaScript := buildLuaScript(luaExpr)
+
+		t.Logf("Regex pattern: %s", regexPattern)
+		t.Logf("Lua expression: %s", luaExpr)
+
+		// Process the content
+		modifiedContent, err := process(fileContent, regex, luaScript)
+		if err != nil {
+			t.Fatalf("Error processing file: %v", err)
+		}
+
+		// Check for expected value (10.5 * 2.5 = 26.25)
+		if !strings.Contains(modifiedContent, "<value>26.25</value>") {
+			t.Errorf("Decimal value not modified correctly, expected <value>26.25</value>")
+			t.Logf("Modified content: %s", modifiedContent)
+		} else {
+			t.Logf("Decimal test passed - found <value>26.25</value>")
+		}
+	})
+}

test_complex.xml

@@ -0,0 +1,12 @@
+<config>
+  <item>
+    <value>150</value>
+    <multiplier>2</multiplier>
+    <divider>4</divider>
+  </item>
+  <item>
+    <value>300</value>
+    <multiplier>3</multiplier>
+    <divider>2</divider>
+  </item>
+</config>

test_data.xml

@@ -0,0 +1,33 @@
+<tests>
+  <!-- Test simple value replacement -->
+  <test id="simple">
+    <value>100</value>
+  </test>
+  
+  <!-- Test with multiple capture groups -->
+  <test id="multi">
+    <value>50</value>
+    <multiplier>3</multiplier>
+    <divider>2</divider>
+  </test>
+  
+  <!-- Test with inline format -->
+  <test id="inline"><value>200</value>,<multiplier>2</multiplier>,<divider>4</divider></test>
+  
+  <!-- Test with nested elements -->
+  <test id="nested">
+    <data>
+      <value>75</value>
+      <settings>
+        <multiplier>4</multiplier>
+        <divider>3</divider>
+      </settings>
+    </data>
+  </test>
+  
+  <!-- Test with decimal values -->
+  <test id="decimal">
+    <value>10.5</value>
+    <multiplier>2.5</multiplier>
+  </test>
+</tests>