Added tests for examples

examples_test.go

@@ -0,0 +1,67 @@
+package main_test
+
+import (
+	"os"
+	"os/exec"
+	"testing"
+
+	"git.akyoto.dev/cli/q/src/build"
+	"git.akyoto.dev/go/assert"
+)
+
+func TestExamples(t *testing.T) {
+	var examples = []struct {
+		Name             string
+		ExpectedOutput   string
+		ExpectedExitCode int
+	}{
+		{"hello", "", 25},
+		{"write", "ELF", 0},
+	}
+
+	for _, example := range examples {
+		example := example
+
+		t.Run(example.Name, func(t *testing.T) {
+			runExample(t, example.Name, example.ExpectedOutput, example.ExpectedExitCode)
+		})
+	}
+}
+
+// runExample builds and runs the example to check if the output matches the expected output.
+func runExample(t *testing.T, name string, expectedOutput string, expectedExitCode int) {
+	b := build.New("examples/" + name)
+	assert.True(t, len(b.Executable()) > 0)
+	defer os.Remove(b.Executable())
+
+	t.Run("Compile", func(t *testing.T) {
+		result, err := b.Run()
+		assert.Nil(t, err)
+
+		err = result.Write(b.Executable())
+		assert.Nil(t, err)
+
+		stat, err := os.Stat(b.Executable())
+		assert.Nil(t, err)
+		assert.True(t, stat.Size() > 0)
+	})
+
+	t.Run("Output", func(t *testing.T) {
+		cmd := exec.Command(b.Executable())
+		output, err := cmd.Output()
+		exitCode := 0
+
+		if err != nil {
+			exitError, ok := err.(*exec.ExitError)
+
+			if !ok {
+				t.Fatal(exitError)
+			}
+
+			exitCode = exitError.ExitCode()
+		}
+
+		assert.Equal(t, exitCode, expectedExitCode)
+		assert.DeepEqual(t, string(output), expectedOutput)
+	})
+}