add test cases for genesis (piplabs#112)

increase coverage to 100%

client/x/evmstaking/types/genesis_test.go

@@ -0,0 +1,65 @@
+package types_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/piplabs/story/client/x/evmstaking/types"
+)
+
+var zeroVallidatorSweepIndex = &types.ValidatorSweepIndex{
+	NextValIndex:    0,
+	NextValDelIndex: 0,
+}
+
+func TestNewGenesisState(t *testing.T) {
+	t.Parallel()
+	tcs := []struct {
+		name                 string
+		params               types.Params
+		expectedGenesisState *types.GenesisState
+	}{
+		{
+			name:   "default params",
+			params: types.DefaultParams(),
+			expectedGenesisState: &types.GenesisState{
+				Params:              types.DefaultParams(),
+				ValidatorSweepIndex: zeroVallidatorSweepIndex,
+			},
+		},
+		{
+			name: "custom params",
+			params: types.NewParams(
+				10,
+				20,
+				30,
+			),
+			expectedGenesisState: &types.GenesisState{
+				Params: types.NewParams(
+					10,
+					20,
+					30,
+				),
+				ValidatorSweepIndex: zeroVallidatorSweepIndex,
+			},
+		},
+	}
+
+	for _, tc := range tcs {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			got := types.NewGenesisState(tc.params)
+			require.Equal(t, tc.expectedGenesisState, got)
+		})
+	}
+}
+
+func TestDefaultGenesisState(t *testing.T) {
+	t.Parallel()
+	expectedGenesisState := &types.GenesisState{
+		Params:              types.DefaultParams(),
+		ValidatorSweepIndex: zeroVallidatorSweepIndex,
+	}
+	require.Equal(t, expectedGenesisState, types.DefaultGenesisState())
+}