journey test for statistics

Author: Byron

tasks.md

@@ -29,7 +29,7 @@
      * [x] for `pretty` binary with support for logging and TUI
    * [x] statistics
    * [ ] ~~a verbose mode to list each object in a pack, similar to existing git-verify-pack~~
-   * [ ] journey tests
+   * [x] journey tests
    * [ ] support for serde/miniserde for all returned data types (features per crate)
 * **stress**
   * [ ] first stress test for validation of a big repository, linux maybe, or something smaller but big enough

tests/snapshots/plumbing-verify-pack-index-with-statistics-success

@@ -0,0 +1,27 @@
+objects per delta chain length
+	 0: 18
+	 1: 4
+	 2: 3
+	 3: 1
+	 4: 2
+	 5: 1
+	 6: 1
+	->: 30
+
+averages
+	delta chain length:            1;
+	decompressed entry [B]:        3456;
+	compressed entry [B]:          1725;
+	decompressed object size [B]:  9621;
+
+compression
+	compressed entries size       : 51.8 KB
+	decompressed entries size     : 103.7 KB
+	total object size             : 288.7 KB
+	pack size                     : 51.9 KB
+
+	compression ratio             : 2.00
+	delta compression ratio       : 5.58
+	delta gain                    : 2.78
+	pack overhead                 : 0.235%
+OK

tests/stateless-journey.sh

@@ -53,12 +53,20 @@ title "CLI"
         expect_run $SUCCESSFULLY "$exe_plumbing" verify-pack "$PACK_FILE"
       }
     )
-    (with "a valid pack file"
+    (with "a valid pack INDEX file"
       PACK_INDEX_FILE="$fixtures/packs/pack-11fdfa9e156ab73caae3b6da867192221f2089c2.idx"
-      it "verifies the pack index successfully and with desired output" && {
-        WITH_SNAPSHOT="$snapshot/plumbing-verify-pack-index-success" \
-        expect_run $SUCCESSFULLY "$exe_plumbing" verify-pack "$PACK_INDEX_FILE"
-      }
+      (with "no statistics"
+        it "verifies the pack index successfully and with desired output" && {
+          WITH_SNAPSHOT="$snapshot/plumbing-verify-pack-index-success" \
+          expect_run $SUCCESSFULLY "$exe_plumbing" verify-pack "$PACK_INDEX_FILE"
+        }
+      )
+      (with "statistics"
+        it "verifies the pack index successfully and with desired output" && {
+          WITH_SNAPSHOT="$snapshot/plumbing-verify-pack-index-with-statistics-success" \
+          expect_run $SUCCESSFULLY "$exe_plumbing" verify-pack --statistics "$PACK_INDEX_FILE"
+        }
+      )
     )
   )
 )