简例s - Variables

1. Set Variable

定义：Returns the given values which can then be assigned to a variables.

示例1：

${a}    Set Variable    50

示例2：

${traffic_in_xpath}=    Set Variable    xpath=//table[@id='blocked_services_table']//td[text()='${service_name}']/parent::tr/td[4]

${traffic_in_status}     Get Element Attribute     ${browser}     ${traffic_in_xpath}//input[@type='checkbox']@checked
${traffic_in_checked}=    Run Keyword If    '${traffic_in_status}'=='None'    Set Variable    false    ELSE    Set Variable    true

2. Create List

定义：Returns a list containing given items.

示例1：

@{list}　　Create List　　a　　b　　c

示例2：

    : FOR    ${index}    IN RANGE    5
    \    # Verify the connection status
    \    ${is_pass}    Run Keyword And Ignore Error    Should Match Regexp    ${result}    Connection.*succeeded!
    \    # Verify the result
    \    Run Keyword If    '@{is_pass}[0]'=='${expected_status}'    Exit For Loop

3. Evaluate　　

定义：Evaluates the given expression in Python and returns the results.

示例1：

generate random ip address
    [Arguments]    ${start}    ${stop}
    [Documentation]    generate random IP address, such as 192.168.1.xxx
    [Return]  ${r}

    ${random}    Evaluate    random.randint(${start},${stop})    random
    ${r}    Set Variable    192.168.1.${random}　

示例2：类型转换

 ${a}    Evaluate    int(4)
 ${b}    Evaluate    int(5)

示例3：结果运算

${ns} =    Create Dictionary    x=${4}    y=${2}
${result}=    Evaluate    x*10 + y    namespace=${ns} 

Result：
${ns} = {'x': 4, 'y': 2}
${result} = 42

　　

4. Get Variable Value

定义：

Returns variable value or default if the variable does not exist.

示例1：

*** Test Cases ***
test case1 - Run Keyword If
    ${a}    Set Variable    50
    Run Keyword If    ${a}>=90    Log    优秀
    ...    ELSE IF    ${a}>=70    Log    良好
    ...    ELSE IF    ${a}>=60    Log    及格
    ...    ELSE    Log    不及格  

    ${a_a}    Get Variable Value    ${a}
    log    ${a_a}

test case2 - Run Keyword Ignore Error
    @{CAPTAINS}    Create List    Picard    Kirk    Archer
    Run Keyword And Ignore Error    Should Be Empty    ${CAPTAINS}
    Log    Reached this point despite of error

    @{list}    Get Variable Value    @{CAPTAINS}
    log    ${list}

运行结果：

Starting test: Rf Test.Helloworld.test case1 - Run Keyword If
20180519 14:34:58.590 : INFO : ${a} = 50
20180519 14:34:58.592 : INFO : 不及格
20180519 14:34:58.594 : INFO : ${a_a} = 50
20180519 14:34:58.594 : INFO : 50
Ending test: Rf Test.Helloworld.test case1 - Run Keyword If

Starting test: Rf Test.Helloworld.test case2 - Run Keyword Ignore Error
20180519 14:34:58.597 : INFO : @{CAPTAINS} = [ Picard | Kirk | Archer ]
20180519 14:34:58.598 : INFO : Length is 3
20180519 14:34:58.599 : FAIL : '['Picard', 'Kirk', 'Archer']' should be empty.
20180519 14:34:58.601 : INFO : Reached this point despite of error
20180519 14:34:58.602 : INFO : @{list} = [ Picard | Kirk | Archer ]
20180519 14:34:58.603 : INFO : ['Picard', 'Kirk', 'Archer']
Ending test: Rf Test.Helloworld.test case2 - Run Keyword Ignore Error