feat(iaas): set custom user-agent header for STACKIT API calls (#821)

relates to STACKITTPR-184

stackit/internal/conversion/conversion_test.go

@@ -5,6 +5,9 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/hashicorp/terraform-plugin-framework/diag"
+	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core"
+
 	"github.com/google/go-cmp/cmp"
 	"github.com/hashicorp/terraform-plugin-framework/attr"
 	"github.com/hashicorp/terraform-plugin-framework/types"
@@ -217,3 +220,87 @@ func TestToJSONMapUpdatePayload(t *testing.T) {
 		})
 	}
 }
+
+func TestParseProviderData(t *testing.T) {
+	type args struct {
+		providerData any
+	}
+	type want struct {
+		ok           bool
+		providerData core.ProviderData
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    want
+		wantErr bool
+	}{
+		{
+			name: "provider has not been configured",
+			args: args{
+				providerData: nil,
+			},
+			want: want{
+				ok: false,
+			},
+			wantErr: false,
+		},
+		{
+			name: "invalid provider data",
+			args: args{
+				providerData: struct{}{},
+			},
+			want: want{
+				ok: false,
+			},
+			wantErr: true,
+		},
+		{
+			name: "valid provider data 1",
+			args: args{
+				providerData: core.ProviderData{},
+			},
+			want: want{
+				ok:           true,
+				providerData: core.ProviderData{},
+			},
+			wantErr: false,
+		},
+		{
+			name: "valid provider data 2",
+			args: args{
+				providerData: core.ProviderData{
+					DefaultRegion:          "eu02",
+					RabbitMQCustomEndpoint: "https://rabbitmq-custom-endpoint.api.stackit.cloud",
+					Version:                "1.2.3",
+				},
+			},
+			want: want{
+				ok: true,
+				providerData: core.ProviderData{
+					DefaultRegion:          "eu02",
+					RabbitMQCustomEndpoint: "https://rabbitmq-custom-endpoint.api.stackit.cloud",
+					Version:                "1.2.3",
+				},
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := context.Background()
+			diags := diag.Diagnostics{}
+
+			actual, ok := ParseProviderData(ctx, tt.args.providerData, &diags)
+			if diags.HasError() != tt.wantErr {
+				t.Errorf("ConfigureClient() error = %v, want %v", diags.HasError(), tt.wantErr)
+			}
+			if ok != tt.want.ok {
+				t.Errorf("ParseProviderData() got = %v, want %v", ok, tt.want.ok)
+			}
+			if !reflect.DeepEqual(actual, tt.want.providerData) {
+				t.Errorf("ParseProviderData() got = %v, want %v", actual, tt.want)
+			}
+		})
+	}
+}