Fix: strip 'u64' suffix from rust-style json

exporter/util.go

@@ -63,9 +63,15 @@ func SanitizeValue(s string) (float64, error) {
 func SanitizeIntValue(s string) (int64, error) {
 	var err error
 	var value int64
+	var cleanedString = s
 	var resultErr string
 
-	if value, err = strconv.ParseInt(s, 10, 64); err == nil {
+	// Check if the string ends with "u64" and strip it off.
+	if strings.HasSuffix(s, "u64") {
+		cleanedString = strings.TrimSuffix(s, "u64")
+	}
+
+	if value, err = strconv.ParseInt(cleanedString, 10, 64); err == nil {
 		return value, nil
 	}
 	resultErr = fmt.Sprintf("%s", err)

exporter/util_test.go

@@ -57,3 +57,53 @@ func TestSanitizeValueNaN(t *testing.T) {
 		t.Fatalf("Value sanitization test for %f fails unexpectedly.", math.NaN())
 	}
 }
+
+func TestSanitizeIntValue(t *testing.T) {
+	tests := []struct {
+		Input          string
+		ExpectedOutput int64
+		ShouldSucceed  bool
+	}{
+		// Baseline int64 parsing.
+		{"1234", 1234, true},
+		{"0", 0, true},
+		{"-1234", -1234, true},
+		{"9223372036854775807", 9223372036854775807, true}, // math.MaxInt64
+		{"-9223372036854775808", -9223372036854775808, true},
+
+		// Rust-style "u64" suffix should be stripped before parsing.
+		{"1234u64", 1234, true},
+		{"0u64", 0, true},
+		{"9223372036854775807u64", 9223372036854775807, true},
+
+		// Values exceeding int64 range must still fail even after stripping.
+		{"9223372036854775808u64", 0, false},  // math.MaxInt64 + 1
+		{"18446744073709551615u64", 0, false}, // math.MaxUint64
+
+		// Suffix stripping is exact: only trailing "u64", case-sensitive, whole suffix.
+		{"1234U64", 0, false}, // uppercase not stripped
+		{"1234u32", 0, false}, // only u64 handled
+		{"u641234", 0, false}, // suffix must be at end
+		{"u64", 0, false},     // empty after stripping
+
+		// Non-numeric and float inputs are not integers.
+		{"abcd", 0, false},
+		{"1234.5", 0, false},
+		{"1234.5u64", 0, false}, // stripped to "1234.5" - still not an int
+		{"", 0, false},
+		{"true", 0, false},
+	}
+
+	for i, test := range tests {
+		actualOutput, err := SanitizeIntValue(test.Input)
+		if err != nil && test.ShouldSucceed {
+			t.Fatalf("Int value sanitization test %d failed with an unexpected error.\nINPUT:\n%q\nERR:\n%s", i, test.Input, err)
+		}
+		if err == nil && !test.ShouldSucceed {
+			t.Fatalf("Int value sanitization test %d succeeded unexpectedly.\nINPUT:\n%q\nGOT:\n%d", i, test.Input, actualOutput)
+		}
+		if test.ShouldSucceed && actualOutput != test.ExpectedOutput {
+			t.Fatalf("Int value sanitization test %d fails unexpectedly.\nINPUT:\n%q\nGOT:\n%d\nEXPECTED:\n%d", i, test.Input, actualOutput, test.ExpectedOutput)
+		}
+	}
+}