regulators: Implements support for and action

Enhance the configuration file parser to support the and action element.

Signed-off-by: Bob King <Bob_King@wistron.com>
Change-Id: I9099bf06606fb52ea7eaa374e2a2b1f924904d4f
diff --git a/phosphor-regulators/src/config_file_parser.cpp b/phosphor-regulators/src/config_file_parser.cpp
index 64b6121..e458ba7 100644
--- a/phosphor-regulators/src/config_file_parser.cpp
+++ b/phosphor-regulators/src/config_file_parser.cpp
@@ -67,9 +67,8 @@
     std::unique_ptr<Action> action{};
     if (element.contains("and"))
     {
-        // TODO: Not implemented yet
-        // action = parseAnd(element["and"]);
-        // ++propertyCount;
+        action = parseAnd(element["and"]);
+        ++propertyCount;
     }
     else if (element.contains("compare_presence"))
     {
@@ -176,6 +175,21 @@
     return actions;
 }
 
+std::unique_ptr<AndAction> parseAnd(const json& element)
+{
+    verifyIsArray(element);
+
+    // Verify if array size less than 2
+    if (element.size() < 2)
+    {
+        throw std::invalid_argument{"Array must contain two or more actions"};
+    }
+    // Array of two or more actions
+    std::vector<std::unique_ptr<Action>> actions = parseActionArray(element);
+
+    return std::make_unique<AndAction>(std::move(actions));
+}
+
 std::unique_ptr<Chassis> parseChassis(const json& element)
 {
     verifyIsObject(element);
diff --git a/phosphor-regulators/src/config_file_parser.hpp b/phosphor-regulators/src/config_file_parser.hpp
index b653c00..d81e403 100644
--- a/phosphor-regulators/src/config_file_parser.hpp
+++ b/phosphor-regulators/src/config_file_parser.hpp
@@ -16,6 +16,7 @@
 #pragma once
 
 #include "action.hpp"
+#include "and_action.hpp"
 #include "chassis.hpp"
 #include "configuration.hpp"
 #include "device.hpp"
@@ -111,6 +112,18 @@
     parseActionArray(const nlohmann::json& element);
 
 /**
+ * Parses a JSON element containing an and action.
+ *
+ * Returns the corresponding C++ AndAction object.
+ *
+ * Throws an exception if parsing fails.
+ *
+ * @param element JSON element
+ * @return AndAction object
+ */
+std::unique_ptr<AndAction> parseAnd(const nlohmann::json& element);
+
+/**
  * Parses a JSON element containing a bit position (from 0-7).
  *
  * Returns the corresponding C++ uint8_t value.
diff --git a/phosphor-regulators/test/config_file_parser_tests.cpp b/phosphor-regulators/test/config_file_parser_tests.cpp
index 6953e07..ed3c271 100644
--- a/phosphor-regulators/test/config_file_parser_tests.cpp
+++ b/phosphor-regulators/test/config_file_parser_tests.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 #include "action.hpp"
+#include "and_action.hpp"
 #include "chassis.hpp"
 #include "config_file_parser.hpp"
 #include "config_file_parser_error.hpp"
@@ -240,7 +241,18 @@
     }
 
     // Test where works: and action type specified
-    // TODO: Not implemented yet
+    {
+        const json element = R"(
+            {
+              "and": [
+                { "i2c_compare_byte": { "register": "0xA0", "value": "0x00" } },
+                { "i2c_compare_byte": { "register": "0xA1", "value": "0x00" } }
+              ]
+            }
+        )"_json;
+        std::unique_ptr<Action> action = parseAction(element);
+        EXPECT_NE(action.get(), nullptr);
+    }
 
     // Test where works: compare_presence action type specified
     // TODO: Not implemented yet
@@ -470,6 +482,53 @@
     }
 }
 
+TEST(ConfigFileParserTests, ParseAnd)
+{
+    // Test where works: Element is an array with 2 actions
+    {
+        const json element = R"(
+            [
+              { "i2c_compare_byte": { "register": "0xA0", "value": "0x00" } },
+              { "i2c_compare_byte": { "register": "0xA1", "value": "0x00" } }
+            ]
+        )"_json;
+        std::unique_ptr<AndAction> action = parseAnd(element);
+        EXPECT_EQ(action->getActions().size(), 2);
+    }
+
+    // Test where fails: Element is an array with 1 action
+    try
+    {
+        const json element = R"(
+            [
+              { "i2c_compare_byte": { "register": "0xA0", "value": "0x00" } }
+            ]
+        )"_json;
+        parseAnd(element);
+        ADD_FAILURE() << "Should not have reached this line.";
+    }
+    catch (const std::invalid_argument& e)
+    {
+        EXPECT_STREQ(e.what(), "Array must contain two or more actions");
+    }
+
+    // Test where fails: Element is not an array
+    try
+    {
+        const json element = R"(
+            {
+              "foo": "bar"
+            }
+        )"_json;
+        parseAnd(element);
+        ADD_FAILURE() << "Should not have reached this line.";
+    }
+    catch (const std::invalid_argument& e)
+    {
+        EXPECT_STREQ(e.what(), "Element is not an array");
+    }
+}
+
 TEST(ConfigFileParserTests, ParseBitPosition)
 {
     // Test where works: 0