Switch to using .MODULE_ROOT anchor

testing_common.go

@@ -0,0 +1,64 @@
+package tiffstructure
+
+import (
+    "os"
+    "path"
+
+    "github.com/dsoprea/go-logging"
+)
+
+var (
+    assetsPath = ""
+)
+
+// getModuleRootPath returns our source-path when running from source during
+// tests.
+func getModuleRootPath() string {
+    moduleRootPath := os.Getenv("TIFF_MODULE_ROOT_PATH")
+    if moduleRootPath != "" {
+        return moduleRootPath
+    }
+
+    currentWd, err := os.Getwd()
+    log.PanicIf(err)
+
+    currentPath := currentWd
+    visited := make([]string, 0)
+
+    for {
+        tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
+
+        _, err := os.Stat(tryStampFilepath)
+        if err != nil && os.IsNotExist(err) != true {
+            log.Panic(err)
+        } else if err == nil {
+            break
+        }
+
+        visited = append(visited, tryStampFilepath)
+
+        currentPath = path.Dir(currentPath)
+        if currentPath == "/" {
+            log.Panicf("could not find module-root: %v", visited)
+        }
+    }
+
+    return currentPath
+}
+
+// getTestAssetsPath returns the test-asset path.
+func getTestAssetsPath() string {
+    if assetsPath == "" {
+        moduleRootPath := getModuleRootPath()
+        assetsPath = path.Join(moduleRootPath, "assets")
+    }
+
+    return assetsPath
+}
+
+// getTestExifImageFilepath returns the file-path of the default EXIF image
+// asset.
+func getTestExifImageFilepath() string {
+    assetsPath := getTestAssetsPath()
+    return path.Join(assetsPath, "file_example_TIFF_1MB-scaled.tiff")
+}