Add tests for NewMultiWallet

.github/workflows/build.yml

@@ -1,27 +1,23 @@
-name: Go
+name: Build and Test
 on: [push]
 jobs:
-
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
+      - name: Set up Go 1.13
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.13
+        id: go
 
-    - name: Set up Go 1.13
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.13
-      id: go
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
-
-
-    - name: Build, run tests and vet
-      run:  |
-        go build
-        go test
-        go vet
-      env:
-        GO111MODULE: "on"
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
 
+      - name: Build, run tests and vet
+        run: |
+          go build
+          go test
+          go vet
+        env:
+          GO111MODULE: "on"

multiwallet_test.go

@@ -0,0 +1,35 @@
+package dcrlibwallet_test
+
+import (
+	"os"
+	"testing"
+	"testing/quick"
+
+	. "github.com/raedahgroup/dcrlibwallet"
+)
+
+// canUseDir returns true if the program can create the directory
+// if it doesn't exist or the directory is empty if it exists.
+// If will delete the directory if it is empty.
+func canUseDir(directory string) bool {
+	if os.MkdirAll(directory, os.ModePerm) == nil {
+		return os.Remove(directory) == nil
+	}
+	return false
+}
+
+// TestNewMultiWallet tests if NewMultiWallet will return an error for valid
+// paths or not return an error for invalid paths
+func TestNewMultiWallet(t *testing.T) {
+	f := func(rootDir string) bool {
+		canUse := canUseDir(rootDir)
+		_, err := NewMultiWallet(rootDir, "", "testnet")
+		if canUse {
+			return err == nil
+		}
+		return err != nil
+	}
+	if err := quick.Check(f, nil); err != nil {
+		t.Error(err)
+	}
+}