Added start of testing framework.

source/app.d

@@ -1,65 +1,84 @@
-import std.typecons;
-import std.path;
-import std.file;
-import std.stdio;
-import std.string;
-import std.algorithm;
-import std.getopt;
-import filesizes;
-import progress;
-
 import utils;
 import ingest;
 
-const DEFAULT_MEDIA_DIR = "/media";
-const DEFAULT_OUTPUT_DIR = "raw";
-
 int main(string[] args) {
-	writeln(
-		"+---------------------------------+\n" ~
-		"|                                 |\n" ~
-		"|       GoPro Ingester            |\n" ~
-		"|         v1.0.0                  |\n" ~
-		"|         by Andrew Lalis         |\n" ~
-		"|                                 |\n" ~
-		"+---------------------------------+\n"
-	);
-    IngestConfig config;
-    config.outputDir = buildPath(getcwd(), DEFAULT_OUTPUT_DIR);
-    string mediaSearchDir = DEFAULT_MEDIA_DIR;
-    auto helpInfo = getopt(
-        args,
-        "mediaDir|i",
-		format!"The base directory from which to search for the GoPro media. Defaults to \"%s\"."(mediaSearchDir),
-		&mediaSearchDir,
-        "outputDir|o",
-		format!"The directory to copy data to. Defaults to \"%s\". Will create the directory if it doesn't exist yet."(config.outputDir),
-		&config.outputDir,
-        "force|f",
-		format!"Whether to forcibly overwrite existing files. Defaults to %s."(config.force),
-		&config.force,
-		"dryRun|d",
-		format!"Whether to perform a dry-run (don't actually copy anything). Defaults to %s."(config.dryRun),
-		&config.dryRun,
-		"bufferSize|b",
-		format!"The size of the buffer for copying files, in bytes. Defaults to %s."(formatFilesize(config.bufferSize)),
-		&config.bufferSize,
-        "clean|c",
-        format!"Whether to remove files from the GoPro media card after copying. Defaults to %s."(config.clean),
-        &config.clean
-    );
-
-    if (helpInfo.helpWanted) {
-        defaultGetoptPrinter("Ingestion tool for importing data from GoPro media cards.", helpInfo.options);
+	printBanner();
+    CliResult result = parseArgs(args);
+    if (result.type == CliResultType.NO_CONTENT) {
         return 0;
+    } else if (result.type == CliResultType.MISSING_MEDIA) {
+        return 1;
+    } else {
+        return copyFiles(result.config);
+    }
 }
 
-    auto nullableGoProDir = getGoProDir(mediaSearchDir);
-    if (nullableGoProDir.isNull) {
-        writeln("Couldn't find GoPro directory.");
-        return 1;
+unittest {
+    // First some utilities to make the tests simpler.
+    import std.stdio;
+    import std.file;
+    import std.path;
+    import std.algorithm;
+    import std.string;
+    import utils;
+
+    struct DirView {
+        DirEntry[] entries;
     }
-    config.inputDir = nullableGoProDir.get();
-    writefln!"Found GoPro media at %s."(config.inputDir);
-    return copyFiles(config);
+
+    DirView getDirView(string dir) {
+        DirView view;
+        foreach (DirEntry entry; dirEntries(dir, SpanMode.shallow)) {
+            view.entries ~= entry;
+        }
+        view.entries.sort!((a, b) => a.name > b.name);
+        return view;
+    }
+
+    int callApp(string[] args ...) {
+        return main(["app"] ~ args);
+    }
+
+    string getBaseCardDir(string name) {
+        return buildPath("test", "media-cards", "card-" ~ name);
+    }
+
+    string getTestCardDir(string name) {
+        return buildPath("test", "media-cards", "card-test-" ~ name);
+    }
+
+    void assertCardsUnchanged(string[] cards ...) {
+        foreach (string card; cards) {
+            string baseDir = getBaseCardDir(card);
+            string testDir = getTestCardDir(card);
+            if (exists(testDir)) {
+                assert(getDirView(baseDir) == getDirView(testDir));
+            }
+        }
+    }
+
+    void prepareCardTests(string[] cards ...) {
+        foreach (string card; cards) {
+            copyDir(getBaseCardDir(card), getTestCardDir(card));
+        }
+    }
+
+    void cleanupCardTests(string[] cards ...) {
+        foreach (string card; cards) {
+            rmdirRecurse(getTestCardDir(card));
+        }
+    }
+
+    string[] allCards = ["1", "2", "3"];
+    prepareCardTests(allCards);
+    writeln(isDir(getBaseCardDir("1")));
+    assert(callApp("-h") == 0);
+    assertCardsUnchanged(allCards);
+    assert(callApp("--help") == 0);
+    assertCardsUnchanged(allCards);
+    assert(callApp("-f", "-h") == 0);
+    assertCardsUnchanged(allCards);
+    // Ingesting from an empty card shouldn't have any effect.
+    assert(callApp("-i", getTestCardDir("1")) == 0);
+    assertCardsUnchanged("1");
 }

source/ingest.d

@@ -8,6 +8,7 @@ import std.string;
 import std.typecons;
 import filesizes;
 import progress;
+import utils;
 
 const DEFAULT_BUFFER_SIZE = 1024 * 1024;
 
@@ -43,7 +44,7 @@ public struct IngestConfig {
  */
 private bool shouldCopyFile(DirEntry entry, string targetFile, bool force) {
     return entry.isFile() &&
-        (entry.name.endsWith(".MP4") || entry.name.endsWith(".WAV")) &&
+        (endsWithAny(entry.name, ".MP4", ".mp4", ".WAV", ".wav")) &&
         (!exists(targetFile) || getSize(targetFile) != entry.size || force);
 }
 
@@ -137,3 +138,17 @@ public int copyFiles(IngestConfig config) {
 
 	return 0;
 }
+
+unittest {
+    import testutils;
+
+    // Test a dry run.
+    prepareCardTests("1");
+    IngestConfig c1;
+    c1.dryRun = true;
+    c1.inputDir = getTestCardDir("1");
+    c1.outputDir = "test-out";
+    assert(copyFiles(c1) == 0);
+    assertCardsUnchanged("1");
+    cleanupCardTests("1");
+}

source/testutils.d

@@ -0,0 +1,51 @@
+module testutils;
+
+import std.stdio;
+import std.file;
+import std.path;
+import std.algorithm;
+import std.string;
+import utils;
+
+struct DirView {
+    DirEntry[] entries;
+}
+
+DirView getDirView(string dir) {
+    DirView view;
+    foreach (DirEntry entry; dirEntries(dir, SpanMode.shallow)) {
+        view.entries ~= entry;
+    }
+    view.entries.sort!((a, b) => a.name > b.name);
+    return view;
+}
+
+string getBaseCardDir(string name) {
+    return buildPath("test", "media-cards", "card-" ~ name);
+}
+
+string getTestCardDir(string name) {
+    return buildPath("test", "media-cards", "card-test-" ~ name);
+}
+
+void assertCardsUnchanged(string[] cards ...) {
+    foreach (string card; cards) {
+        string baseDir = getBaseCardDir(card);
+        string testDir = getTestCardDir(card);
+        if (exists(testDir)) {
+            assert(getDirView(baseDir) == getDirView(testDir));
+        }
+    }
+}
+
+void prepareCardTests(string[] cards ...) {
+    foreach (string card; cards) {
+        copyDir(getBaseCardDir(card), getTestCardDir(card));
+    }
+}
+
+void cleanupCardTests(string[] cards ...) {
+    foreach (string card; cards) {
+        rmdirRecurse(getTestCardDir(card));
+    }
+}

source/utils.d

@@ -1,8 +1,129 @@
 module utils;
 
 import std.typecons;
-import std.file;
+import ingest;
+
+const DEFAULT_MEDIA_DIR = "/media";
+const DEFAULT_OUTPUT_DIR = "raw";
+
+public enum CliResultType {
+    OK,
+    NO_CONTENT,
+    MISSING_MEDIA
+}
+
+public struct CliResult {
+    CliResultType type;
+    IngestConfig config;
+}
+
+public CliResult parseArgs(string[] args) {
     import std.path;
+    import std.file;
+    import std.getopt;
+    import std.string;
+    import std.stdio;
+    import filesizes;
+    CliResult result;
+    IngestConfig config;
+    config.outputDir = buildPath(getcwd(), DEFAULT_OUTPUT_DIR);
+    string mediaSearchDir = DEFAULT_MEDIA_DIR;
+    auto helpInfo = getopt(
+        args,
+        "mediaDir|i",
+		format!"The base directory from which to search for the GoPro media. Defaults to \"%s\"."(mediaSearchDir),
+		&mediaSearchDir,
+        "outputDir|o",
+		format!"The directory to copy data to. Defaults to \"%s\". Will create the directory if it doesn't exist yet."(config.outputDir),
+		&config.outputDir,
+        "force|f",
+		format!"Whether to forcibly overwrite existing files. Defaults to %s."(config.force),
+		&config.force,
+		"dryRun|d",
+		format!"Whether to perform a dry-run (don't actually copy anything). Defaults to %s."(config.dryRun),
+		&config.dryRun,
+		"bufferSize|b",
+		format!"The size of the buffer for copying files, in bytes. Defaults to %s."(formatFilesize(config.bufferSize)),
+		&config.bufferSize,
+        "clean|c",
+        format!"Whether to remove files from the GoPro media card after copying. Defaults to %s."(config.clean),
+        &config.clean
+    );
+
+    if (helpInfo.helpWanted) {
+        defaultGetoptPrinter("Ingestion tool for importing data from GoPro media cards.", helpInfo.options);
+        result.type = CliResultType.NO_CONTENT;
+        return result;
+    } else {
+        auto nullableGoProDir = getGoProDir(mediaSearchDir);
+        if (nullableGoProDir.isNull) {
+            writeln("Couldn't find GoPro directory.");
+            result.type = CliResultType.MISSING_MEDIA;
+        } else {
+            config.inputDir = nullableGoProDir.get();
+            writefln!"Found GoPro media at %s."(config.inputDir);
+            result.type = CliResultType.OK;
+            result.config = config;
+        }
+    }
+    return result;
+}
+
+unittest {
+    assert(parseArgs(["app", "-h"]).type == CliResultType.NO_CONTENT);
+    // TODO: Expand tests.
+}
+
+public void printBanner() {
+    import std.stdio : writeln;
+    writeln(
+		"+---------------------------------+\n" ~
+		"|                                 |\n" ~
+		"|       GoPro Ingester            |\n" ~
+		"|         v1.0.0                  |\n" ~
+		"|         by Andrew Lalis         |\n" ~
+		"|                                 |\n" ~
+		"+---------------------------------+\n"
+	);
+}
+
+public bool endsWithAny(string s, string[] suffixes ...) {
+    import std.algorithm : endsWith;
+    foreach (string suffix; suffixes) {
+        if (s.endsWith(suffix)) return true;
+    }
+    return false;
+}
+
+unittest {
+    assert(endsWithAny("abc", "a", "b", "c"));
+    assert(!endsWithAny("abc", "d"));
+    assert(!endsWithAny("abc", "A", "B", "C"));
+}
+
+/** 
+ * Copies all files from the given source directory, to the given destination
+ * directory. Will create the destination directory if it doesn't exist yet.
+ * Overwrites any files that already exist in the destination directory.
+ * Params:
+ *   sourceDir = The source directory to copy from.
+ *   destDir = The destination directory to copy to.
+ */
+public void copyDir(string sourceDir, string destDir) {
+    import std.file;
+    if (!isDir(sourceDir)) return;
+    if (exists(destDir) && !isDir(destDir)) return;
+    if (!exists(destDir)) mkdirRecurse(destDir);
+    import std.path : buildPath, baseName;
+    foreach (DirEntry entry; dirEntries(sourceDir, SpanMode.shallow)) {
+        string destPath = buildPath(destDir, baseName(entry.name));
+        if (entry.isDir) {
+            copyDir(entry.name, destPath);
+        } else if (entry.isFile) {
+            copy(entry.name, destPath);
+        }
+    }
+}
 
 /** 
  * Tries to find a GoPro's media directory.
@@ -11,7 +132,9 @@ import std.path;
  * Returns: A nullable string that, if present, refers to the GoPro's media
  * directory.
  */
-public Nullable!string getGoProDir(string baseDir) {
+private Nullable!string getGoProDir(string baseDir) {
+    import std.file;
+    import std.path;
     if (!exists(baseDir) || !isDir(baseDir)) return Nullable!string.init;
     foreach (dir; std.file.dirEntries(baseDir, SpanMode.breadth)) {
         // We know that a GoPro contains DCIM/100GOPRO in it.

test/media-cards/card-1/DCIM/100GOPRO/tmp.txt

@@ -0,0 +1 @@
+Hello

test/media-cards/card-1/README.md

@@ -0,0 +1,2 @@
+# Card 1
+This is an empty card.

test/media-cards/card-2/DCIM/100GOPRO/tmp.txt

@@ -0,0 +1 @@
+Hello

test/media-cards/card-2/README.md

@@ -0,0 +1 @@
+# Card 2

test/media-cards/card-3/DCIM/100GOPRO/tmp.txt

@@ -0,0 +1 @@
+Hello

test/media-cards/card-3/README.md

@@ -0,0 +1 @@
+# Card 3