Add tests

test/cmdlineTests/no_import_callback/args

@@ -0,0 +1 @@
+--no-import-callback no_import_callback/contract_1.sol

test/cmdlineTests/no_import_callback/contract_1.sol

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+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+import "contract_2.sol";
+
+contract A {}

test/cmdlineTests/no_import_callback/contract_2.sol

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+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+contract B {}

test/cmdlineTests/no_import_callback/err

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+Error: Source "contract_2.sol" not found: File reader callback is disabled.
+ --> no_import_callback/contract_1.sol:4:1:
+  |
+4 | import "contract_2.sol";
+  | ^^^^^^^^^^^^^^^^^^^^^^^^

test/cmdlineTests/no_import_callback/exit

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+1

test/cmdlineTests/standard_no_import_callback/B.sol

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+contract B {}

test/cmdlineTests/standard_no_import_callback/args

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+--no-import-callback

test/cmdlineTests/standard_no_import_callback/input.json

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+{
+	"language": "Solidity",
+	"sources":
+	{
+		"A":
+		{
+			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\nimport \"B.sol\"; contract A {}"
+		}
+	}
+}

test/cmdlineTests/standard_no_import_callback/output.json

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+{
+    "errors":
+    [
+        {
+            "component": "general",
+            "errorCode": "6275",
+            "formattedMessage": "ParserError: Source \"B.sol\" not found: File reader callback is disabled.
+ --> A:3:1:
+  |
+3 | import \"B.sol\"; contract A {}
+  | ^^^^^^^^^^^^^^^
+
+",
+            "message": "Source \"B.sol\" not found: File reader callback is disabled.",
+            "severity": "error",
+            "sourceLocation":
+            {
+                "end": 74,
+                "file": "A",
+                "start": 59
+            },
+            "type": "ParserError"
+        }
+    ],
+    "sources": {}
+}

test/cmdlineTests/standard_no_import_callback_urls/A.sol

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+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+import "contract_2.sol";
+
+contract A {}

test/cmdlineTests/standard_no_import_callback_urls/args

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+--allow-paths . --no-import-callback

test/cmdlineTests/standard_no_import_callback_urls/input.json

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+{
+  "language": "Solidity",
+  "sources": {
+    "A": {
+      "urls": [
+        "standard_no_import_callback_urls/A.sol"
+      ]
+    }
+  },
+  "settings": {"outputSelection": {"*": { "*": ["metadata", "evm.bytecode"]}}}
+}

test/cmdlineTests/standard_no_import_callback_urls/output.json

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+{
+    "errors":
+    [
+        {
+            "component": "general",
+            "formattedMessage": "Cannot import url (\"standard_no_import_callback_urls/A.sol\"): File reader callback is disabled.",
+            "message": "Cannot import url (\"standard_no_import_callback_urls/A.sol\"): File reader callback is disabled.",
+            "severity": "error",
+            "type": "IOError"
+        }
+    ],
+    "sources": {}
+}

test/solc/CommandLineParser.cpp

@@ -241,6 +241,13 @@ BOOST_AUTO_TEST_CASE(no_cbor_metadata)
 	BOOST_TEST(assert);
 }
 
+BOOST_AUTO_TEST_CASE(no_import_callback)
+{
+	vector<string> commandLine = {"solc", "--no-import-callback", "contract.sol"};
+	CommandLineOptions parsedOptions = parseCommandLine(commandLine);
+	BOOST_TEST(parsedOptions.input.noImportCallback);
+}
+
 BOOST_AUTO_TEST_CASE(via_ir_options)
 {
 	BOOST_TEST(!parseCommandLine({"solc", "contract.sol"}).output.viaIR);