issue-1795: LargeDeletionMarkers - simple integration test (#2122)

cloud/filestore/tests/client/canondata/result.json

@@ -11,6 +11,9 @@
     "test.test_describe_sessions": {
         "uri": "file://test.test_describe_sessions/results.txt"
     },
+    "test.test_large_file": {
+        "uri": "file://test.test_large_file/results.txt"
+    },
     "test.test_list_filestores": {
         "uri": "file://test.test_list_filestores/results.txt"
     },

cloud/filestore/tests/client/nfs-storage.txt

@@ -1 +1,3 @@
 MultiTabletForwardingEnabled: true
+LargeDeletionMarkersEnabled: true
+MaxFileBlocks: 536870912

cloud/filestore/tests/client/test.py

@@ -19,19 +19,25 @@ def __init_test():
     return client, results_path
 
 
+def __process_stat(node):
+    def d(k):
+        if k in node:
+            del node[k]
+
+    d("ATime")
+    d("MTime")
+    d("CTime")
+    d("FollowerNodeName")
+
+    return node
+
+
 def __exec_ls(client, *args):
     output = str(client.ls(*args, "--json"), 'utf-8')
     nodes: list = json.loads(output)['content']
 
     for node in nodes:
-        def d(k):
-            if k in node:
-                del node[k]
-
-        d("ATime")
-        d("MTime")
-        d("CTime")
-        d("FollowerNodeName")
+        __process_stat(node)
 
     return json.dumps(nodes, indent=4).encode('utf-8')
 
@@ -428,3 +434,61 @@ def test_multitablet_findgarbage():
 
     ret = common.canonical_file(results_path, local=True)
     return ret
+
+
+def test_large_file():
+    TiB = 1024 * 1024 * 1024 * 1024
+
+    data_file = os.path.join(common.output_path(), "data.txt")
+    with open(data_file, "w") as f:
+        f.write("some data")
+
+    client, results_path = __init_test()
+    client.create(
+        "fs0",
+        "test_cloud",
+        "test_folder",
+        BLOCK_SIZE,
+        TiB // BLOCK_SIZE)
+    client.mkdir("fs0", "/aaa")
+    client.touch("fs0", "/aaa/bbb")
+
+    out = client.stat("fs0", "/aaa/bbb")
+    stat = json.loads(out)
+    node_id = stat["Id"]
+    result = json.dumps(__process_stat(stat))
+    result += "\n"
+
+    client.write("fs0", "/aaa/bbb", "--data", data_file)
+
+    client.set_node_attr("fs0", node_id, "--size", str(TiB))
+    result += client.read("fs0", "/aaa/bbb", "--length", "9").decode("utf8")
+    result += "\n"
+
+    out = client.stat("fs0", "/aaa/bbb")
+    stat = json.loads(out)
+    assert stat["Size"] == TiB
+    result += json.dumps(__process_stat(stat))
+    result += "\n"
+
+    client.set_node_attr("fs0", node_id, "--size", "1024")
+    result += client.read("fs0", "/aaa/bbb", "--length", "0").decode("utf8")
+    result += "\n"
+
+    out = client.stat("fs0", "/aaa/bbb")
+    new_stat = json.loads(out)
+    assert stat["Size"] == TiB
+    result += json.dumps(__process_stat(new_stat))
+    result += "\n"
+    result += client.read("fs0", "/aaa/bbb", "--length", "0").decode("utf8")
+    result += "\n"
+
+    client.rm("fs0", "/aaa/bbb")
+
+    client.destroy("fs0")
+
+    with open(results_path, "w") as results_file:
+        results_file.write(result)
+
+    ret = common.canonical_file(results_path, local=True)
+    return ret

cloud/filestore/tests/python/lib/client.py

@@ -261,6 +261,10 @@ def mkdir(self, cmd):
     def write(self, cmd):
         return common.execute(cmd).stdout
 
+    @standard_command("read")
+    def read(self, cmd):
+        return common.execute(cmd).stdout
+
     @standard_command("touch")
     def touch(self, cmd):
         return common.execute(cmd).stdout