feat: initial public version

engine/exec_test.go

@@ -0,0 +1,74 @@
+package engine
+
+import (
+	"errors"
+	"strings"
+	"testing"
+
+	"github.com/nalgeon/codapi/execy"
+)
+
+func TestProgram_Run(t *testing.T) {
+	commands := map[string]execy.CmdOut{
+		"mock stdout": {Stdout: "stdout", Stderr: "", Err: nil},
+		"mock stderr": {Stdout: "", Stderr: "stderr", Err: nil},
+		"mock outerr": {Stdout: "stdout", Stderr: "stderr", Err: nil},
+		"mock err":    {Stdout: "", Stderr: "stderr", Err: errors.New("error")},
+	}
+	mem := execy.Mock(commands)
+
+	for key, want := range commands {
+		t.Run(key, func(t *testing.T) {
+			p := NewProgram(3, 100)
+			name, arg, _ := strings.Cut(key, " ")
+			stdout, stderr, err := p.Run("mock_42", name, arg)
+			if !mem.Has(key) {
+				t.Errorf("Run: command %q not run", key)
+			}
+			if stdout != want.Stdout {
+				t.Errorf("stdout: want %#v, got %#v", want.Stdout, stdout)
+			}
+			if stderr != want.Stderr {
+				t.Errorf("stderr: want %#v, got %#v", want.Stderr, stderr)
+			}
+			if err != want.Err {
+				t.Errorf("err: want %#v, got %#v", want.Err, err)
+			}
+		})
+	}
+}
+
+func TestProgram_LimitOutput(t *testing.T) {
+	commands := map[string]execy.CmdOut{
+		"mock stdout": {Stdout: "1234567890", Stderr: ""},
+		"mock stderr": {Stdout: "", Stderr: "1234567890"},
+		"mock outerr": {Stdout: "1234567890", Stderr: "1234567890"},
+	}
+	execy.Mock(commands)
+
+	const nOutput = 5
+	{
+		p := NewProgram(3, nOutput)
+		stdout, _, _ := p.Run("mock_42", "mock", "stdout")
+		if stdout != "12345" {
+			t.Errorf("stdout: want %#v, got %#v", "12345", stdout)
+		}
+	}
+	{
+		p := NewProgram(3, nOutput)
+		_, stderr, _ := p.Run("mock_42", "mock", "stderr")
+		if stderr != "12345" {
+			t.Errorf("stderr: want %#v, got %#v", "12345", stderr)
+		}
+	}
+	{
+		p := NewProgram(3, nOutput)
+		stdout, stderr, _ := p.Run("mock_42", "mock", "outerr")
+		if stdout != "12345" {
+			t.Errorf("stdout: want %#v, got %#v", "12345", stdout)
+		}
+		if stderr != "12345" {
+			t.Errorf("stderr: want %#v, got %#v", "12345", stderr)
+		}
+	}
+}