Adding basic flag parser test

Author: merschformann

run/flagparser_test.go

@@ -0,0 +1,77 @@
+package run_test
+
+import (
+	"os"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/nextmv-io/sdk/run"
+)
+
+type ParallelSolveOptions struct {
+	Iterations           int           `json:"iterations"  usage:"maximum number of iterations, -1 assumes no limit; iterations are counted after start solutions are generated" default:"-1"`
+	Duration             time.Duration `json:"duration" usage:"maximum duration of the solver" default:"5s"`
+	ParallelRuns         int           `json:"parallel_runs" usage:"maximum number of parallel runs, -1 results in using all available resources" default:"-1"`
+	StartSolutions       int           `json:"start_solutions" usage:"number of solutions to generate on top of those passed in; one solution generated with sweep algorithm, the rest generated randomly" default:"-1"`
+	RunDeterministically bool          `json:"run_deterministically"  usage:"run the parallel solver deterministically"`
+}
+
+type SampleOption struct {
+	Solve  ParallelSolveOptions `json:"solve,omitempty"`
+	Custom struct {
+		Solve struct {
+			Plateau struct {
+				Auto bool `json:"auto" usage:"whether to enable auto plateau detection"`
+			} `json:"plateau"`
+		} `json:"solve"`
+	} `json:"custom,omitempty"`
+}
+
+func Test_FlagParser(t *testing.T) {
+	// Simulate command line arguments
+	os.Args = []string{
+		"cmd",
+		"-solve.iterations=10",
+		"-custom.solve.plateau.auto=true",
+		"-solve.duration=5m",
+	}
+	defer func() { os.Args = os.Args[:1] }()
+
+	_, option, err := run.FlagParser[SampleOption, run.CLIRunnerConfig]()
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	expectedOption := SampleOption{
+		Solve: ParallelSolveOptions{
+			Iterations:           10,
+			Duration:             5 * time.Minute,
+			ParallelRuns:         -1,
+			StartSolutions:       -1,
+			RunDeterministically: false,
+		},
+		Custom: struct {
+			Solve struct {
+				Plateau struct {
+					Auto bool `json:"auto" usage:"whether to enable auto plateau detection"`
+				} `json:"plateau"`
+			} `json:"solve"`
+		}{
+			Solve: struct {
+				Plateau struct {
+					Auto bool `json:"auto" usage:"whether to enable auto plateau detection"`
+				} `json:"plateau"`
+			}{
+				Plateau: struct {
+					Auto bool `json:"auto" usage:"whether to enable auto plateau detection"`
+				}{
+					Auto: true,
+				},
+			},
+		},
+	}
+	if !reflect.DeepEqual(option, expectedOption) {
+		t.Errorf("expected option %+v, got %+v", expectedOption, option)
+	}
+}