POC Test for Paring Mappings with Envconfig

internal/broker/envconfig_test.go

@@ -0,0 +1,104 @@
+package broker
+
+import (
+    "os"
+    "testing"
+
+	"github.com/vrischmann/envconfig"
+    "github.com/stretchr/testify/assert"
+)
+type MyConfig struct {
+    SapConveregedCloudMapping []struct {
+        BtpRegion string
+        SkrRegion string
+    } `envconfig:""`
+}
+
+func TestEnvConfig(t *testing.T) {
+
+    t.Run("should parse one to one mapping", func(t *testing.T) {
+        // given 
+        os.Setenv("APP_SAP_CONVEREGED_CLOUD_MAPPING", "{cf-eu20-staging,eu-de-1}")
+        var cfg MyConfig
+
+        // when 
+        err := envconfig.InitWithPrefix(&cfg, "APP")
+
+        // then
+        assert.NoError(t, err)
+        assert.NotNil(t, cfg.SapConveregedCloudMapping)
+        assert.Equal(t, 1, len(cfg.SapConveregedCloudMapping))
+        assert.Equal(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[0].BtpRegion)
+        assert.Equal(t, "eu-de-1", cfg.SapConveregedCloudMapping[0].SkrRegion)
+
+    })
+
+    t.Run("should parse one to many mapping", func(t *testing.T) {
+        // given 
+        os.Setenv("APP_SAP_CONVEREGED_CLOUD_MAPPING", "{cf-eu20-staging,eu-de-1},{cf-eu20-staging,eu-de-2}")
+        var cfg MyConfig
+
+        // when 
+        err := envconfig.InitWithPrefix(&cfg, "APP")
+
+        // then
+        assert.NoError(t, err)
+        assert.NotNil(t, cfg.SapConveregedCloudMapping)
+        assert.Equal(t, 2, len(cfg.SapConveregedCloudMapping))
+        assert.Equal(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[0].BtpRegion)
+        assert.Equal(t, "eu-de-1", cfg.SapConveregedCloudMapping[0].SkrRegion)
+
+        assert.Equal(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[1].BtpRegion)
+        assert.Equal(t, "eu-de-2", cfg.SapConveregedCloudMapping[1].SkrRegion)
+    })
+
+    t.Run("does not parse mappings with newlines", func(t *testing.T) {
+        // given 
+        os.Setenv("APP_SAP_CONVEREGED_CLOUD_MAPPING", `
+            {cf-eu20-staging,eu-de-1},
+            {cf-eu20-staging,eu-de-2}
+        `)
+        var cfg MyConfig
+
+        // when 
+        err := envconfig.InitWithPrefix(&cfg, "APP")
+
+        // then
+        assert.NoError(t, err)
+        assert.NotNil(t, cfg.SapConveregedCloudMapping)
+        assert.Equal(t, 2, len(cfg.SapConveregedCloudMapping))
+        assert.NotEqual(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[0].BtpRegion)
+        assert.Equal(t, "eu-de-1", cfg.SapConveregedCloudMapping[0].SkrRegion)
+
+        assert.NotEqual(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[1].BtpRegion)
+        assert.NotEqual(t, "eu-de-2", cfg.SapConveregedCloudMapping[1].SkrRegion)
+    })
+
+
+    t.Run("should parse multiple one to many mappings", func(t *testing.T) {
+        // given 
+        os.Setenv("APP_SAP_CONVEREGED_CLOUD_MAPPING", `{cf-eu20-staging,eu-de-1},{cf-eu20-staging,eu-de-2},{cf-eu21-staging,eu-pl-1},{cf-eu21-staging,eu-pl-2}`)
+        var cfg MyConfig
+
+        // when 
+        err := envconfig.InitWithPrefix(&cfg, "APP")
+
+        // then
+        assert.NoError(t, err)
+        assert.NotNil(t, cfg.SapConveregedCloudMapping)
+        assert.Equal(t, 4, len(cfg.SapConveregedCloudMapping))
+
+        assert.Equal(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[0].BtpRegion)
+        assert.Equal(t, "eu-de-1", cfg.SapConveregedCloudMapping[0].SkrRegion)
+
+        assert.Equal(t, "cf-eu20-staging", cfg.SapConveregedCloudMapping[1].BtpRegion)
+        assert.Equal(t, "eu-de-2", cfg.SapConveregedCloudMapping[1].SkrRegion)
+
+        assert.Equal(t, "cf-eu21-staging", cfg.SapConveregedCloudMapping[2].BtpRegion)
+        assert.Equal(t, "eu-pl-1", cfg.SapConveregedCloudMapping[2].SkrRegion)
+
+        assert.Equal(t, "cf-eu21-staging", cfg.SapConveregedCloudMapping[3].BtpRegion)
+        assert.Equal(t, "eu-pl-2", cfg.SapConveregedCloudMapping[3].SkrRegion)
+    })
+
+}