test: added tests for the pkg/integration package (#904)

This commit adds new tests for the `pkg/integration` package. As a
result, the code the code coverage of the package has increased from 0%
to 100%

This also includes a minor adjustment in the error statements of the
`Activate` and `Deactive` functions to ensure better understanding of
the cause of the error.

Signed-off-by: VaibhavMalik4187 <vaibhavmalik2018@gmail.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>

pkg/integration/integration.go

@@ -92,7 +92,7 @@ func (*Integration) Activate(name string, namespace string, activeFilters []stri
 
 	if !skipInstall {
 		if err := integrations[name].Deploy(namespace); err != nil {
-			return err
+			return fmt.Errorf("failed to deploy %s integration: %w", name, err)
 		}
 	}
 	mergedFilters := activeFilters
@@ -127,7 +127,7 @@ func (*Integration) Deactivate(name string, namespace string) error {
 	}
 
 	if err := integrations[name].UnDeploy(namespace); err != nil {
-		return err
+		return fmt.Errorf("failed to undeploy %s integration: %w", name, err)
 	}
 
 	viper.Set("active_filters", activeFilters)

pkg/integration/integration_test.go

@@ -0,0 +1,142 @@
+/*
+Copyright 2024 The K8sGPT Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package integration
+
+import (
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAnalyzerByIntegration(t *testing.T) {
+	integration := NewIntegration()
+	_, err := integration.Get("invalid-name")
+	require.ErrorContains(t, err, "integration not found")
+
+	tests := []struct {
+		name         string
+		expectedName string
+		expectedErr  string
+	}{
+		{
+			name:        "random",
+			expectedErr: "analyzerbyintegration: no matches found",
+		},
+		{
+			name:         "PrometheusConfigValidate",
+			expectedName: "prometheus",
+		},
+		{
+			name:         "PrometheusConfigRelabelReport",
+			expectedName: "prometheus",
+		},
+		{
+			name:         "VulnerabilityReport",
+			expectedName: "trivy",
+		},
+		{
+			name:         "ConfigAuditReport",
+			expectedName: "trivy",
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			name, err := integration.AnalyzerByIntegration(tt.name)
+			if tt.expectedErr == "" {
+				require.NoError(t, err)
+				require.Equal(t, tt.expectedName, name)
+			} else {
+				require.ErrorContains(t, err, tt.expectedErr)
+				require.Empty(t, name)
+			}
+		})
+	}
+}
+
+func TestActivate(t *testing.T) {
+	integration := NewIntegration()
+	err := integration.Activate("prometheus", "", []string{}, true)
+	require.ErrorContains(t, err, "error writing config file:")
+
+	err = integration.Deactivate("prometheus", "")
+	require.ErrorContains(t, err, "error writing config file:")
+
+	configFileName := "config.json"
+	_, err = os.CreateTemp("", configFileName)
+	require.NoError(t, err)
+	defer os.Remove(configFileName)
+
+	// Set the configuration file in viper
+	viper.SetConfigType("json")
+	viper.SetConfigFile(configFileName)
+
+	inteNotFoundErr := "integration not found"
+	tests := []struct {
+		name                    string
+		namespace               string
+		activeFilters           []string
+		skipInstall             bool
+		expectedIsActivate      bool
+		expectedActivationErr   string
+		expectedIsActivateError string
+		expectedDeactivationErr string
+	}{
+		{
+			name:                    "invalid integration",
+			expectedActivationErr:   inteNotFoundErr,
+			expectedIsActivateError: inteNotFoundErr,
+			expectedDeactivationErr: inteNotFoundErr,
+		},
+		{
+			name:               "prometheus",
+			skipInstall:        true,
+			expectedIsActivate: true,
+		},
+		{
+			name:                    "trivy",
+			skipInstall:             false,
+			expectedActivationErr:   "failed to deploy trivy integration:",
+			expectedDeactivationErr: "failed to undeploy trivy integration:",
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			err := integration.Activate(tt.name, tt.namespace, tt.activeFilters, tt.skipInstall)
+			if tt.expectedActivationErr == "" {
+				require.NoError(t, err)
+			} else {
+				require.ErrorContains(t, err, tt.expectedActivationErr)
+			}
+
+			ok, err := integration.IsActivate(tt.name)
+			if tt.expectedIsActivateError == "" {
+				require.NoError(t, err)
+				require.Equal(t, tt.expectedIsActivate, ok)
+			} else {
+				require.ErrorContains(t, err, tt.expectedIsActivateError)
+			}
+
+			err = integration.Deactivate(tt.name, tt.namespace)
+			if tt.expectedDeactivationErr == "" {
+				require.NoError(t, err)
+			} else {
+				require.ErrorContains(t, err, tt.expectedDeactivationErr)
+			}
+		})
+	}
+}