wrote tests

cmd/slowql-replayer/main_test.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"errors"
+	"reflect"
+	"testing"
+)
+
+func Test_options_parse(t *testing.T) {
+	type opt struct {
+		user       string
+		host       string
+		pass       string
+		file       string
+		kind       string
+		database   string
+		loglvl     string
+		pprof      string
+		workers    int
+		factor     float64
+		usePass    bool
+		noDryRun   bool
+		showErrors bool
+	}
+	tests := []struct {
+		name string
+		opt  opt
+		want []error
+	}{
+		{
+			name: "no errors",
+			opt: opt{
+				user:     "foo",
+				host:     "bar",
+				file:     "myfile",
+				kind:     "mykind",
+				database: "mydb",
+				workers:  42,
+				factor:   2,
+			},
+			want: nil,
+		},
+		{
+			name: "one error",
+			opt: opt{
+				user:     "foo",
+				host:     "bar",
+				file:     "myfile",
+				kind:     "mykind",
+				database: "mydb",
+				// workers:  42,
+				factor: 2,
+			},
+			want: []error{errors.New("cannot create negative number or zero workers")},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			o := &options{
+				user:       tt.opt.user,
+				host:       tt.opt.host,
+				pass:       tt.opt.pass,
+				file:       tt.opt.file,
+				kind:       tt.opt.kind,
+				database:   tt.opt.database,
+				loglvl:     tt.opt.loglvl,
+				pprof:      tt.opt.pprof,
+				workers:    tt.opt.workers,
+				factor:     tt.opt.factor,
+				usePass:    tt.opt.usePass,
+				noDryRun:   tt.opt.noDryRun,
+				showErrors: tt.opt.showErrors,
+			}
+			if got := o.parse(); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("options.parse() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}