Sequence Matchers¶
Matchers of sequences.
contains_exactly¶
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class
hamcrest.library.collection.issequence_containinginorder.IsSequenceContainingInOrder(matchers)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_mismatch(item, mismatch_description)¶ Generates a description of why the matcher has not accepted the item.
The description will be part of a larger description of why a matching failed, so it should be concise.
This method assumes that
matches(item)isFalse, but will not check this.- Parameters
item – The item that the
Matcherhas rejected.mismatch_description – The description to be built or appended to.
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describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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matches(sequence, mismatch_description=None)¶ Evaluates the matcher for argument item.
If a mismatch is detected and argument
mismatch_descriptionis provided, it will generate a description of why the matcher has not accepted the item.- Parameters
item – The object against which the matcher is evaluated.
- Returns
Trueifitemmatches, otherwiseFalse.
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hamcrest.library.collection.issequence_containinginorder.contains_exactly(match1[, match2[, ...]])¶ Matches if sequence’s elements satisfy a given list of matchers, in order.
- Parameters
match1,.. – A comma-separated list of matchers.
This matcher iterates the evaluated sequence and a given list of matchers, seeing if each element satisfies its corresponding matcher.
Any argument that is not a matcher is implicitly wrapped in an
equal_tomatcher to check for equality.
contains_inanyorder¶
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class
hamcrest.library.collection.issequence_containinginanyorder.IsSequenceContainingInAnyOrder(matchers)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_mismatch(item, mismatch_description)¶ Generates a description of why the matcher has not accepted the item.
The description will be part of a larger description of why a matching failed, so it should be concise.
This method assumes that
matches(item)isFalse, but will not check this.- Parameters
item – The item that the
Matcherhas rejected.mismatch_description – The description to be built or appended to.
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describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
-
matches(sequence, mismatch_description=None)¶ Evaluates the matcher for argument item.
If a mismatch is detected and argument
mismatch_descriptionis provided, it will generate a description of why the matcher has not accepted the item.- Parameters
item – The object against which the matcher is evaluated.
- Returns
Trueifitemmatches, otherwiseFalse.
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hamcrest.library.collection.issequence_containinginanyorder.contains_inanyorder(match1[, match2[, ...]])¶ Matches if sequences’s elements, in any order, satisfy a given list of matchers.
- Parameters
match1,.. – A comma-separated list of matchers.
This matcher iterates the evaluated sequence, seeing if each element satisfies any of the given matchers. The matchers are tried from left to right, and when a satisfied matcher is found, it is no longer a candidate for the remaining elements. If a one-to-one correspondence is established between elements and matchers,
contains_inanyorderis satisfied.Any argument that is not a matcher is implicitly wrapped in an
equal_tomatcher to check for equality.
has_item, has_items¶
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class
hamcrest.library.collection.issequence_containing.IsSequenceContaining(element_matcher)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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class
hamcrest.library.collection.issequence_containing.IsSequenceContainingEvery(*element_matchers)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_mismatch(item, mismatch_description)¶ Generates a description of why the matcher has not accepted the item.
The description will be part of a larger description of why a matching failed, so it should be concise.
This method assumes that
matches(item)isFalse, but will not check this.- Parameters
item – The item that the
Matcherhas rejected.mismatch_description – The description to be built or appended to.
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describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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hamcrest.library.collection.issequence_containing.has_item(match)¶ Matches if any element of sequence satisfies a given matcher.
- Parameters
match – The matcher to satisfy, or an expected value for
equal_tomatching.
This matcher iterates the evaluated sequence, searching for any element that satisfies a given matcher. If a matching element is found,
has_itemis satisfied.If the
matchargument is not a matcher, it is implicitly wrapped in anequal_tomatcher to check for equality.
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hamcrest.library.collection.issequence_containing.has_items(match1[, match2[, ...]])¶ Matches if all of the given matchers are satisfied by any elements of the sequence.
- Parameters
match1,.. – A comma-separated list of matchers.
This matcher iterates the given matchers, searching for any elements in the evaluated sequence that satisfy them. If each matcher is satisfied, then
has_itemsis satisfied.Any argument that is not a matcher is implicitly wrapped in an
equal_tomatcher to check for equality.
is_in¶
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class
hamcrest.library.collection.isin.IsIn(sequence)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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hamcrest.library.collection.isin.is_in(sequence)¶ Matches if evaluated object is present in a given sequence.
- Parameters
sequence – The sequence to search.
This matcher invokes the
inmembership operator to determine if the evaluated object is a member of the sequence.
only_contains¶
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class
hamcrest.library.collection.issequence_onlycontaining.IsSequenceOnlyContaining(matcher)¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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hamcrest.library.collection.issequence_onlycontaining.only_contains(match1[, match2[, ...]])¶ Matches if each element of sequence satisfies any of the given matchers.
- Parameters
match1,.. – A comma-separated list of matchers.
This matcher iterates the evaluated sequence, confirming whether each element satisfies any of the given matchers.
Example:
only_contains(less_than(4))
will match
[3,1,2].Any argument that is not a matcher is implicitly wrapped in an
equal_tomatcher to check for equality.
empty¶
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class
hamcrest.library.collection.is_empty.IsEmpty¶ Bases:
hamcrest.core.base_matcher.BaseMatcher-
describe_to(description)¶ Generates a description of the object.
The description may be part of a description of a larger object of which this is just a component, so it should be worded appropriately.
- Parameters
description – The description to be built or appended to.
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matches(item, mismatch_description=None)¶ Evaluates the matcher for argument item.
If a mismatch is detected and argument
mismatch_descriptionis provided, it will generate a description of why the matcher has not accepted the item.- Parameters
item – The object against which the matcher is evaluated.
- Returns
Trueifitemmatches, otherwiseFalse.
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hamcrest.library.collection.is_empty.empty()¶ This matcher matches any collection-like object that responds to the __len__ method, and has a length of 0.